Fixed on the sectional door shaft, relying on the balance and torsion of the spring torsion, the door works.Enough strength is availableNice style and durable in use

Competitive Advantage:1. Assembled with spring fittings.2. Each spring will be delivered with identification lable with spring data3. It can be used with the automatic motors to realize the door opening4. With smooth work to operate the garage door5. Any other accessories about garage door, we can also provide for you, contact us freely.6. Supply Ability: 3000Pcs/Pieces/Week

About CHI Hardware

We have been in garage door for years, including the panel and accessories, such as torsion spring, top bracket, bottom bracket, central bearing bracket, roller ( nylon, plastic or steel roller), lift handle, cable drum, tube shaft, flag bracket and so on.Also we provide the service of garage door installation, hope we can be helpful in your business.